发明授权
US5804489A Method of manufacturing a crown shape capacitor in semiconductor memory
using a single step etching
失效
使用单步蚀刻在半导体存储器中制造冠状电容器的方法
- 专利标题: Method of manufacturing a crown shape capacitor in semiconductor memory using a single step etching
- 专利标题(中): 使用单步蚀刻在半导体存储器中制造冠状电容器的方法
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申请号: US679196申请日: 1996-07-12
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公开(公告)号: US5804489A公开(公告)日: 1998-09-08
- 发明人: Fu-Liang Yang , Erik S. Jeng , Yu-Chun Ho , Bin Liu , Chao-Ming Koh
- 申请人: Fu-Liang Yang , Erik S. Jeng , Yu-Chun Ho , Bin Liu , Chao-Ming Koh
- 申请人地址: TWX Hsinchu
- 专利权人: Vanguard International Semiconductor Corporation
- 当前专利权人: Vanguard International Semiconductor Corporation
- 当前专利权人地址: TWX Hsinchu
- 主分类号: H01L21/8242
- IPC分类号: H01L21/8242 ; H01L27/108
摘要:
The present invention is a method of manufacturing crown shape capacitors in the semiconducter memories. Using a single step etching to farbricate the capacitor in a DRAM cell. The method can form side wall polymers and etching byproductions on the surface of the first polysilicon, using the side wall polymers and the etching byproductions as a mask to form the crown shape capacitors with pillars. Moreover, this present invention can form the crown shape structure and pillars in the same step, the crown shape structure and the pillars increase the surface area of the capacitor. Therefore the present invention will increase the performance of the capacitor.
公开/授权文献
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